CONDAIR DLHybrid spray and evaporative humidifier

Humidification and Evaporative Cooling

CONDAIR DLHybrid spray and evaporative humidifier

Reverse osmosis water treatmentThe supply water is purified to lessthan 15μS to prevent minerals frombeing introduced to the duct and tomaintain hygienic operation.

Control panelIncorporating the latest touch screentechnology, the control panel providesintuitive operation and advancedreporting.

Pump and silver ionisation unit Condair’s patentedHygiene Plus systemtreats the waterwith silver ionisationto actively inhibitmicrobial growththroughout thehumidifier.

Water softener Softened water is required to achieve the required water purity and prolongs the operational lifetime of the RO filters.

Close control adiabatic humidifier with ultra hygienic performance

By combining spray and evaporativetechnologies, the Condair DL provides alevel of humidity control typically onlyachievable from electric steamhumidifiers but with the low energyconsumption of an adiabatic system.

A ±2%RH control accuracy can bedelivered through the use of multi-stage and fully modulating sprayoutput followed by moistureevaporation from the ceramicevaporative module.

The Condair DL has many anti-microbialfeatures, making it one of the mosthygienic adiabatic humidifiers in the world.

The system has been independentlytested and achieved SGS InstitutFrensenius certification forhygienic operation.

Atomising nozzle gridSpray nozzles initially activate in stagesand then operate with fully modulatingoutput to provide very accuratehumidity control.

Ceramic evaporative unitHas the dual effect of removingdroplets from the airstream andallowing evaporation from its poroussurface, improving humidificationefficiency and minimising drain water.

Variable pressure sprays allow a fully modulating output for extremely close humidity control

The Condair DL offers close humiditycontrol of up to ±2%RH by combiningvariable pressure spray and evaporative technology.

The humidifier’s output is increasedinitially in stages by incrementallyactivating sets of nozzles on the grid.Depending on the size of unit, this canbe from 7 to 31 initial stages of control.Following this initial output, thehumidifier’s pump will increase thewater pressure up to 7 bar across thecomplete nozzle grid, providing fullymodulating control up to full output.

This level of control is not possible witheither in-duct high pressure spray orevaporative humidifiers and is similarto the accuracy of steamhumidification.

Each nozzle can be adjusted to a 15°angle in any direction on the manifold.This reduces wetting on the duct wall,provides a more even mist across theduct, uniform humidification on theevaporative module and a consistenthumidity throughout the airstream.

The ceramic evaporative modulelocated opposite the nozzle grid removes unabsorbed water dropletsfrom the air and prevents wetting

downstream. Moisture not absorbed bythe air in the spray section isevaporated from its surface. Thisresults in improved humidification andefficient water use, with very littlewater going to drain.

Due to its innovative design it causes alower pressure drop than evaporativehumidifiers (40Pa @ 2m/s), reducingthe power consumption of AHU fans.

Close control adiabatic humidifier

Indicative output at 2bar inlet pressure

100%

Output

60%

20%

80%

40%

0%1 5 133 7 119 102 6 15 Fully modulating output4 8 1412

Precise humidifier output through increased water pressure

Close control of ±2%RH from initial stage then fully modulating control

Silver ionisation of the water inhibits microbial growth throughout the humidification system and the in-duct humidifier section

The Condair DL incorporates manyhygiene features to make it one of themost hygienic in-duct adiabatichumidifiers in the world. The systemhas been independently tested by theSGS Institut Frensenius in Germanyand certified for hygienic operation.Throughout a six month testing periodthe humidifier outperformed theVDI6022 industry standard formicrobial growth, achieving amaximum CFU/ml microbial count 85%less than the recommended limit.

A patented Hygiene Plus featureprovides silver ionisation watertreatment. Silver has a residualsterilising effect and actively inhibitsmicrobial growth throughout the

humidifier. The Hygiene Plus systemdelivers the exact level of disinfectingsilver needed depending on thehumidity output at any time.

Alongside the system operating onpure RO water, flush and drain cyclesensure water cannot remain in supplypipelines or the humidifier itself longenough to stagnate. The system willdrain if left unused for 12 hours andperform a flush cycle wheneverpowered-up.

An optional pipe flushing featureallows water to be drained from thepipework between the RO filter and thecentral pump station.

Advanced hygiene features

Patented Hygiene Plussilver ionisation

Effective germ neutralization with silver ions

Ag+

Reducing operating costs and a building’s carbon footprint

In-duct adiabatic humidifiers can significantly reduce theoperating cost of a building’s humidity control whencompared to traditional electric steam humidifiers.

As moisture is absorbed using heat from the air, rather thanby electrically heating water to create steam, the mainenergy source can be shifted from electricity to gas. Bywarming the air prior to the humidifier with gas-firedheating, the exact same amount of energy is consumed butas gas is much cheaper, the humidification system’s overalloperating cost is reduced.

If it is possible to recover waste heat from the building topre-heat the airstream prior to the humidifier, the energycost of Condair DL humidification is a tiny fraction incomparison to using electric steam humidifiers.

The Condair DL can also be used in the summertime toprovide low energy adiabatic cooling to an air handling unit.For every 1kg of humidity absorbed by the air around 0.68kWof cooling is also delivered. As a single Condair DL canprovide up to 1,000kg/h, the system can supplyapproximately 680kW of adiabatic cooling per hour, whileoperating on around 1kW of electricity.

Low energy humidification and adiabatic cooling

Condair DL + gas-fired pre-heating

Electric steam humidifier

Annual humidification energy cost

Humidification output (kg/h)

125

£0k £20k £40k £60k £80k £100k £120k £140k £160k £180k

375

625

750

875

250

500

£41,000 savings

£55,000 savings

£68,000 savings

£82,000 savings

£96,000 savings

1,000£110,000 savings

£27,000 savings

£14,000 savings

Based on full humidifier output for 2,500 hours per year, gas at 3p/kW and 80% efficient pre-heating, and electricity at 9p/kW and a 94% efficientelectric steam humidifier.

Touch screen controller for intuitive operational control and advanced reporting

Control at your fingertips

The Condair DL incorporates the latesttouch screen control panel, providingintuitive operation and extensivereporting.

Operating parameters can be seen at aglance and easily adjusted, service andfault history is displayed, and detailedtrouble-shooting suggestions offered.

A USB connection allows allperformance data to be recorded andexported into Excel for advanceddiagnostics. Upgrades to software canalso easily be made via the USB port.

BMS connectivity is included asstandard using Modbus, BACnet IP andBACnet MSTP (slave). An optional PCBfor LonWorks and BTL certified BACnetis also available.

Operational status, fault and maintenance data isrecorded via USB and analysed in Excel.

08/2018

Typical system overview

1 Control panel2 Central unit (pump and silver ion

water treatment)3 Spray nozzle grid4 Ceramic evaporative unit

Accesssories

a Water supply flushing valveb In-duct humidistat

min. 3 m

1

2

3

4

a

b

Technical data

Options

Water softenerReverse osmosis water treatment systemLeak monitoringExternal pipe flushing setBMS gateway board (LonWorks or BACnetIP/BACnet MSTP)Mounting frame for pump station andcontrol unitSilicon-freeDroplet eliminator (for air velocities 3-4m/s)

Condair Pty Ltd (formerly Aireven)Unit 4, 38 Leighton Place, Hornsby NSW 2077Tel: 02 9987 2006 - email: au.info@condair.com - www.condair.com.au

Dimensions / Weight Type A (with booster pump) Type B (without booster pump) Absorption distance in AHU/duct (min-max) 600–900mm Width AHU/duct (min-max) 450–4,500mm Height AHU/duct (min-max) 450–4,000mm Central unit HxWxD 800 x 500 x 250mm Central unit weight Approx. 54kg Approx. 35kg Control unit HxWxD 450 x 315 x 190mm Control unit weight Approx. 14kg HydraulicHumidification capacity 10–1,000kg/h Nozzle pressure 3–7 bar Nozzle sizes 1.5, 2.5, 3.0, 4.0, 5.0kg/h @ 4barWater quality requirement Reverse osmosis water 0.5–15.0μS/cm ElectricSupply voltage/current control unit 200-240VAC / 50-60Hz, max 6A Control booster pump motor Continuous with frequency converter - Control unit power consumption 55-65VA Motor rating booster pump Approx. 10VA per 10kg/h spray capacity - Frequency converter Yes No

Control accuracy 7 steps: ±3%RH

15 steps: ±2%RH31 steps: ±2%RH

7 steps: ±4%RH 15 steps: ±3%RH31 steps: ±2%RH

CommunicationRemote operating & fault indication board Yes Modbus RTU Yes BACnet IP and BACnet MSTP slave mode YesAirPressure drop (2m/s) Approx. 40PaMax. air velocity 3m/s without droplet eliminator. 4m/s with droplet eliminatorAir filter quality before humidifier F7 (EU7) or betterMax. recommended air temp 60°C (before humidifier)

Larger units available on demand. Higher temperatures available on demand. Control accuracy may vary depending on various external factors, e.g. temperature.